Air diffuser



Malt-6, 1923. v 1,447,776. A. FRIEDMAN ET Al..

AIR DIFFUSER. Y

FILED MAY 26,1921- 5 o 9 loI l 3 1a, J1 1410- Patented ar.. 6, i923. i

Assia snrnnmam or nsw Yoann. Y., ann ARTHUR ze. KNowLns, or Urrea i.Mon'iorinrn, new JERSEY.' i i' .ein nrrsusnn.

Y Application inea nay as, i321. seriaiiro. 472,645. o

To all whom 'it may' concern.'

Be it :known that we, ABRAHAM"Flinn)-V MAN, a citizen ofthe UnitedStates, residing in the city ofl New York, in the borough and county4vofA Queensand Sta-te of Nev York, and AR'rHU'R F. `liisovifnns,"acitizenof the United States, residing at Upper Montclair, in the countyof Essex andr State of Newgilersey, have invented'a certainnew anduseful Improvement. in Air Diffusers, of which the following isa'specicationf livering air from loor ductsin Aventilating systems, andthe object :of the invention `is to provide a simple, economicallyvconstructed diffuser adapted to be conveniently lo cated beneath thechairv and toreceive air from a duct andwdeliverit directly to theauditorium with a minimum of friction, and so shaped that it isnotlikely to.v causeV acci-` dents by being used as a yfoot-rest` by theoccupant of v,theynext chair in the rear.l

lAnother important object is to provide and 'waste matter into thedeliveryopenings of the diuser,` anda vfurther object `is to provideeasily operated. adjusting i, means for varying the volume ofl air de-`livered through such openings,

rlhe invention consistsfin certain novel features and details ofconstruction andarrangement by which the above objects'are attained, tobe hereinafter described and claimed. Y,

The accompanying drawings form a part of this specification and show theinvention as it has been carried out in practice. I i

Figure 1 is a perspective view `showing a portion of a row of theatrechairs,` with an improved diffuser in place. l

Figure 2- is a side elevation vofone of the diifusers alone, on alargerscale, and partly in vertical section. 5

Figure' 3 is an end `view of the same. Figurefl is a plan Viewcorresponding i to Figure 2 and partly in horizontal section. `Figure 5is a transverse sectionv taken on the line V-V in Figure 2.

Figure 6 is a vertical section corresponding to a portion of Figure 2,showing certain details `on a still larger scale.

Referring to the drawings, l is lthe floor having an opening 2 leadingfrom a duct or air conduit, not shown, forming part of the fair supplysystem beneath thev floor.

The diffusers are` located at: intervals` ben eath the seats 3 and,eachcomprises a boX- like casingor shell ofirectangular form in planview, preferably a thin casting, open at the bottom to matchftlie llooropening from the duct, and openat the ends to permit, the egress of air.The sides 4 of the casing are higherat the ends, and theup- Y per facesare correspondingly inclined,as

Y'showmv'to a flattened if-form, sothatkthe l K y y leasing vis flaredoppositelyand the air led rlhe inventionk relates to devices for `de-vvrith little friction from the duct to the open delivery ends, whileproviding a s hape be used as foot-rest.

rlhe casing is secured to the floor by screws extending through holes inthe flanges l13 on the sides 4:.

xiilt each open end onpeach side on the in-v terior ai'evertical groovesl"v formed vby the spaces betweenthe vertical ribs 6 exl'tending' fromthe top `nearly to the lower means for preventingthe entrance of dust K`6 and lies upon the floor, as clearly shown in Figure 6. The strips 9and l0 are vjoined to the margin of the screen by rivets 12 extendingtherethrough.

Beside stidening the upright portion 10 and horizontal portion il of theouter strip serve to prevent the ingress of dust and the like in theoperation of cleaning the auditorium floor.

The shape of the diffusers permits the casing to be lowwithout'interfering with the easy unobstructed delivery of air, a factorof importance in installations in auditoriums equippedwith low-slungseats, and by directing the currents in opposite directionslongitudinally of the row of seats, the fresh air is introduced withoutdiscomfort to the chair-occupants- By reason of the large admission anddelivery areas, due to the shape of the improved diifuser, a smallernumber may be employed Ito``v supplyfthe required volume of air, thuseifectingasaving 1n`air-duct construction.

In :the complete `form` of thek invention, as illustrated in thedrawings, two independent dampers 14 are provided within the casing, onefor each end, by which the flow ofair may be controlled. Each dampercomprises a plate of sheet metal mounted upon 'a transverseshaft l nearthecentreof the casing, havinga handle 1 6 on the exterior by whichthelplatefmay be raised or lowered I to expose more or less 'of the openend, and the handle y is'A `arranged to engage in notches 17 on asegment l1,8 to hold the damper in the adjusted position.A

'1.,'l`he dii'user described, comprising a Casing open atl the ends andbottom and closed atthe opposite sides and having its sides and topupwardly and oppositely in-` clined from :the centre, adapted to receivearfthrough such bottom and deliver it opv positlely :simultaneouslythrough such flared ,2, .The diifuser described, comprising a casing;openiat the ends and bottom4 and closed at opposite sides and 'havingits sides and top upwardly and oppositely inclined from the centre,ladapted to receive air through such bottom' and deliver it oppositelythroughl such flared ends, and open.` work screens covering the openingsat such ends, the opening in the bottom being con-` tinuous from end toend. v

The diffuser described, comprising ycasing .open at the ends andfbottom,and

positely `inclined fronillthe centre', adapted toreceive "i1-ir throughsuch` bottom' and deliver it oppositely `throughsuch'flared ends,

and a horizontally disposed damper in eac-hof said ends arranged, toswing vertically and control the iiow throughsuch ends.

`5. 'The diffuser described, comprising la casing open at the'y endsandn bottoni; and having its sides and top upwardly and oppo- `sitelyinclined from the centre, adapted to receive air' through such, bottomand deliver it oppositely through such ends, ahorzontally disposeddainper'in each ofgsaid ends arrangedto swing verticallyand controltheflow through such ends,`andmeansv kon 'the exterior of said casing formoving `said dampers independently Aand yholding them in theadjustedposition.- I

In testimony ythat we claim the invention above set forthwe afiliX `oursig-natures;

s ABRAHAM nniEDMAN.

nnrHU-RF. n-.Nownns

